Method of producing self-lighting gas-mantles.



UNITED earns MEET E. FREDERIO w. MAYER, or new YORK, N. Y., ASSIGNOR TO rERrEOTEn sELF LIGHTING MANTLE COMPANY, or NEW, YORK, N. Y A CORPORATION OF NEW YORK. I

SELF-LEGHTlNG GAS-=MANTL3.

METHOD OF PRODUCENG No. 855,798. Specification of Letters. Patent.

Application filed $evtembei 3, 1906- Serial No. 333,814.

To all "whom it may concern;

Be it known that I, FREDERIO a citizen of the United States, residing at the borough of Bronx, city of New York, county of New York, and State of New York, have invented certain new and useful improve ments in Methods of Producing Self-Lighting Gaslilantles, of. which the following is a specification.

My invention self-igniting incandescent sequence, when the protective coating .or dip is burned off, the pellet of platinum black not being in contact with nor having adherence to the inner skeleton 'of the man tle. either falls off. entirely or adheres to the mantle by the weakest and most fragile connection, which soon loosens still more under the vibration to whichthe mantle is con-' ,stantly subject and underthe action of a temperature which is liable to great an sudden changes. It is this incomplete hesion of the catalytic pellet to the mantle which has made self-lighting gas mantles so uncertain in action and W. MAYER,

relates to the art of making gas mantles, and more particularly'it has relation to a new method of attaching the catalytic agent usedto the reticulation of the mantle.

The object of the invention is to provide a selflighting mantle in which the pellet of platinum black, or other catalytic body, shall be more firmly attached to the skeletonized webbing than has heretofore been the case, and my invention consists in the method herein described and more particularly stated in the claims appended.

Incandescent gas mantles are composed of a cotton tube which is impregnated with the salts of certain earths such for instance as so liable to become inoperative after the first lighting.

My process contemplates the mixing the platinum black, or other catalytic agent used, with a liquid of the dip with with the solvent forming a semi-liquid pasty the mantle In ,the

form of a pellet, or 111 streaks or rings.

The vehicle of the paste nitrate of thorium. After drying, such rmdissolves the "dip or protective coat ng pregnated tubes are calcmed, t e textile awavfrom the interior skeleton structure at mesh being burned out reducing the tho the place wl ere it is applied and the'catarium nitrate to thoria and leaving a finely lytic agent therefore comes into intimate reticulated and very delicate mineral skelecontact with the network of thorium .01

ton. As this is extremely flimsy and weak it is necessary, in order that the mantles may withstand handling and transportation, that they be dipped ',-that is, given a protective coating of paraiiin, collodion, or some other protective agent. It is in this condition that mantles come to the hands of the smaller 'manufacturers, and in order to render such mantles self-igniting it is necessary that there be attached thereto a pellet of some catalytic material,-platinum black being that most generally used. This hasusually been done by'inaking. the platinum black into a paste with water, and then applying a drop or pellet of the paste to the fabric of the mantle.

As above stated, the mantle comes to the hands of the small manufacturer after it has received its protective coating or dip of paraffin or collodion, and after this coating has become comparatively hard. Such a coating covers the skeleton of the mantle with a continuous shell or layer and other salt,-adheres closely thereto and is so; intermingled with the fiber thereof that after the vehicle has evaporated it cannotbe and contraction. WVhile I may use as a vehicle for the aste any liquid which has the power of disso ving the clip with which a mantle may be covmixed with aste a better consistency, whether th dip is formed ofcollodion or' ara'liin and collodion, tively cheap yet eilective solvent and easily handled. it is that the chemical vehicle employed t pellet dries around it or upon it. .As atom which shall be a solvent which the mantle has been mass which may be applied to the fabric 9 disengaged therefrom by jar or by expansion- Patented June 4, 1907. I

coated, the mixture of the catalytic agent ere-d, I prefer to use either alcohol or alcohol glycerin in order to giveithe': depending upon as this is a comparato be understood, however,

for the paste depends entirely upon the const tu-l parafin is not affected by the burning away I catalytic a ent in intimate contact with the of the dip but remains firmly attached t fibers of n53 mantle. 21 the mineral skeleton. 16 'art of for mg self-igniting gas aving described my invention What I mantles consisting of preparing a tube of claim is: textile mesh, impre nating said tube with l. The prwessof applying catalytic. masalts of certain refractory eartl burning tcria'l to piotected gas mantles which conout the textile mesh, and leavin a skeleton o sists in forming the catalytic a cnt thereof 0 refractory material, covering said skeleton into a aste with a solvent of the protective n'iesh W tli a pi otective ating, applying COVGJTHIP of said mantle, applying the paste tiereto a paste formed of a cataly ic agent to the mantle thereby dissolving such covermixed with a so vent of the protective coat ing at the point of application and allowin ing, and thereby-dissolving said coatin at 35 said solvent to evapo te. the point of application and allowin the ie process of applying catalytic ma sai solvent to evaporat terial to protected gas mantles, which 'con- In testimony whereof, I have signed my sists in forming a paste of a catalytic a cnt name to this specification in the presence of and a solvent of the protective covering of we subsciibing Witnesses, this 6th day of 0 said mantle, forming the astle i to a eiiiipteniber1906. i uid el et, a plyin the pel et to the pro- T I T teiztive ccveririg of said mantle, thus dis- IREDERIL M solving aWay'the said protective through the action of said solvent, owing said solvent to evaporate, leaving the lvitnesses FREDERIC B. WRIGHT, GEORGE CALVERT. 

